I'm visiting Tokyo at the moment (i'm right here in jpod101 international headquarters at the moment; i can see the back of marky's head right now!) and there a few things that i have found difficult. they aren't language related, but i just thought maybe we could get some info in a podcast.
Trains/metro: there are two different mass transit systems, train and metro. This wasn't immediately apparent to me when I first looked at a map of tokyo. if you want to change from a train line to a metro line, you need to exit the station, and buy a new ticket. I guess that it's something that you get used to, but as first time visitor to japan, and particularly someone coming from a place that has an integrated metro system, and no trains (shanghai) i found it really difficult. Add the fact that there are several train/metro lines, and it gets really confusing really quickly, and unless someone explains it to you you can get very lost.
Addresses: when someone first gave me a japanese address I thought that they had misunderstood what I had asked for. There were only 5 kanji, and three numbers. No street names. I still don't understand japanese addresses, I just input the address into google maps and let them work it out. but i am curious to know how addresses work in japan.
Arigatou marky-sensei!